Oscar Collazo (January 20, 1914 – February 21, 1994) was one of two Puerto Rican militants of the Nationalist Party who on November 1, 1950, attempted to assassinate U.S. President Harry S. Truman in Washington, DC. He had been living in New York City after growing up in Puerto Rico. Collazo was convicted and sentenced to death, but Truman commuted his sentence to life imprisonment. In 1979 Collazo's sentence was commuted to time served by President Jimmy Carter. He was paroled and allowed to return to Puerto Rico.